<html>
<head>
</head>
<body>
<p style="font-weight: normal;">
    Hello world!
</p>
<p style="font-weight: normal;">
    <b>Hello World!</b>
</p>
<p style="font-weight: normal;">
    <span style="font-weight: bold;">Hello World!</span>
</p>
</body>
</html>